1/√ 18 + 1/√ 2 = 1/√ 3*3*2 + 1/√ 2 = 1/ 3√ 2 + 1/√ 2 = 3√ 2+√ 2 / 3√ 2*√ 2 = 4√ 2/3*2 = 4√ 2 /6 =
2√ 2 /3 = √ 2*2*2/ 3 = √ 2*2*2 /√ 3*3 = √ 2*2*2/3*3 = √ 2/3*2/3*2 = 2/3*√ 2
1/√ 18 + 1/√ 2 = 1/√ 3*3*2 + 1/√ 2 = 1/ 3√ 2 + 1/√ 2 = 3√ 2+√ 2 / 3√ 2*√ 2 = 4√ 2/3*2 = 4√ 2 /6 =
2√ 2 /3 = √ 2*2*2/ 3 = √ 2*2*2 /√ 3*3 = √ 2*2*2/3*3 = √ 2/3*2/3*2 = 2/3*√ 2